12311561760 has 48 divisors (see below), whose sum is σ = 38781421056. Its totient is φ = 3283083008.

The previous prime is 12311561753. The next prime is 12311561761. The reversal of 12311561760 is 6716511321.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (12311561761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12824064 + ... + 12825023.

It is an arithmetic number, because the mean of its divisors is an integer number (807946272).

Almost surely, 2^12311561760 is an apocalyptic number.

12311561760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12311561760 is an abundant number, since it is smaller than the sum of its proper divisors (26469859296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12311561760 is a wasteful number, since it uses less digits than its factorization.

12311561760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25649105 (or 25649097 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 33.

The spelling of 12311561760 in words is "twelve billion, three hundred eleven million, five hundred sixty-one thousand, seven hundred sixty".